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xtask: Add proper diff printing in case of incorrect results

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This commit is contained in:
Henrik Tjäder 2023-02-06 13:03:15 +01:00
parent 6ed64610c9
commit d5471f2da4
2 changed files with 11 additions and 5 deletions
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1
xtask/Cargo.toml
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@ -11,3 +11,4 @@ clap = { version = "4", features = ["derive"] }
env_logger = "0.10.0"
log = "0.4.17"
rayon = "1.6.1"
diffy = "0.3.0"

15
xtask/src/main.rs
View file

@ -130,19 +130,23 @@ pub enum TestRunError {
CommandError(RunResult),
IncompatibleCommand,
}
use diffy::{create_patch, PatchFormatter};
impl fmt::Display for TestRunError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
TestRunError::FileCmpError { expected, got } => {
let patch = create_patch(expected, got);
writeln!(f, "Differing output in files.\n")?;
writeln!(f, "Expected:")?;
writeln!(f, "{expected}\n")?;
writeln!(f, "Got:")?;
write!(f, "{got}")
let pf = PatchFormatter::new().with_color();
writeln!(f, "{}", pf.fmt_patch(&patch))?;
write!(
f,
"See flag --overwrite-expected to create/update expected output."
)
}
TestRunError::FileError { file } => {
write!(f, "File error on: {file}\nSee flag overwrite.")
write!(f, "File error on: {file}\nSee flag --overwrite-expected to create/update expected output.")
}
TestRunError::CommandError(e) => {
write!(
@ -403,6 +407,7 @@ fn arm_example(command: &CargoCommand, overwrite: bool) -> anyhow::Result<()> {
file: expected_output_file.clone(),
}
})?;
info!("Flag --overwrite-expected enabled");
info!("Creating/updating file: {expected_output_file}");
file_handle.write_all(cargo_run_result.output.as_bytes())?;
};